Home Flood work index Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20
 |
A special gantry has to be brought in to support the BT
conduits while the manhole demolition continues. The new 600ml twin-wall pipe cannot be bent so collars of different angles are required to change direction. (photo below) 9/2/06 |
| Geology notes (thanks to Harberton resident,
geologist Martin Stokes, for his advice): The trench here is about 6 feet
deep. Beneath the tarmac is a lightish layer over a foot thick, probably
including the crushed stone road surface before the advent of tarmac in the early years of the 20th Century.
Below that, a natural brownish layer of similar thickness, sitting atop
the 380 million year old metamorphic bedrock, known locally as "shillit",
a kind of slate. Does anyone know when tarmac roads first came to this part of the world? 9/2/06 |
 |
 |
Attention to detail! At the western end of the new bridge
parapet a low point was spotted at the entrance to Simmons Barns, so an
extra surface drain was put in. 10/2/06 |
| After a huge amount of manual work the BT box has gone.
The big new pipe has to change direction - twice - here to pass under the
old cast-iron water main, while the BT conduits remain suspended above
everything. The BT box has to be re-built, and BT have to come and do
that. 10/2/06
|
 |
 |
Another change of plan. The change in direction (above)
for the pipe did not work - the angles were not right for the collar - so
further careful excavation around and under the cast-iron water main were
needed to put a further straight section of pipe in instead, and all this
on a Saturday. The broken pipe on the left was where the western stream used to run under the road edge. At the moment the stream is flowing into the bottom of the trench from behind the camera position and then out again into the new pipe. 11/2/06 |